[papasombre]

Hi, guys.

Some years ago I brought two cordless Bosch drills from China. They use 220 volts chargers I used without problems until now.

I have four rechargeable Ni-Cd batteries that are reaching the end of their life cycle. They have stamped this data 14,4v 1,5Ah.

I´ve searched on the web for some spare but none give some info about the volts they use. Any help will be apreciated.

 

[JOAT]

Afraid I can't help you on that. And that is one of the reasons I only use corded drills in my shop. Never have to recharge anything, never have to buy replacement batteries. And the corded drills are a lot less expensive. I've got a B&D corded drill I bought in about 1975, and still use it.

 

[Semipro]

Alexis
Is a part number on the batteries and or the drills

 

[ggom]

Hello!

The parts can be bought from bosh services ..

Or if you mean to dismount the battery and change elements , this could be quite difficult and
expensive to rebuilt.
battery cells can be bought by units , 12 units at 1.2 v each would make 14.4 v choose the 1.5 a/h type, same physical size.
And the good technology , then when disassembling , take care of preserving a possible temperature sensor, ,put it back in place in your
new assembly.
Then you will notice it is feasible , but not easy.
And maybe not so economical.
maybe have a look on internet as some are proposing this kind of rebuild.
My personal case:
Not economical to buy batteries , so i continue buying cordless drills with them 2 batteries
Got about 30 lbs of used battery powered drills in some storage boxes, waiting for the day i could use a dc universal motor...


Regards
ggom

 

[Cherryville Chuck]

Alexis if the charger is still good you may be able to rejuvenate
The batteries by freezing them for at 24 hrs. 48 may be better. I've tried this a few times with success. Once was quite an improvement. You have nothing to lose by trying it.

 

[hawkeye10]

Alexis if the charger is still good you may be able to rejuvenate
The batteries by freezing them for at 24 hrs. 48 may be better. I've tried this a few times with success. Once was quite an improvement. You have nothing to lose by trying it.

Thanks Chuck. This is something most of us need to know.

 

[PapaTango]

I've had a similar issue with a complete injection-moulded case-set of cordless tools, bought in the UK ages ago. Now I live in the US, I was hoping to find alternative batteries but so far no joy however, I have tried the freezing trick on old laptop batteries and it does definitely work well.

For the cordless tools though I used a different trick which involves using a similar or slightly larger cordless battery (my tools are 18v so I used a charged 20v donor) connecting the positive to positive terminals with insulated wire and similar with the negative terminals EXCEPT that only tapping the donor terminal two or three times is necessary, rather than a longer-term connection. It seems to jolt the memory of the older battery into re-awakening and accepting another charge. I also use the UK Charger through a voltage-converter into the US wall-socket.

I expect there's a technical reason for this which is above me but I took the precaution of doing this in the open air with commonsense safety precautions just in case, but in my case nothing dangerous occurred but the 18v tools now work once again.

 

[Cherryville Chuck]

I've had a similar issue with a complete injection-moulded case-set of cordless tools, bought in the UK ages ago. Now I live in the US, I was hoping to find alternative batteries but so far no joy however, I have tried the freezing trick on old laptop batteries and it does definitely work well.

For the cordless tools though I used a different trick which involves using a similar or slightly larger cordless battery (my tools are 18v so I used a charged 20v donor) connecting the positive to positive terminals with insulated wire and similar with the negative terminals EXCEPT that only tapping the donor terminal two or three times is necessary, rather than a longer-term connection. It seems to jolt the memory of the older battery into re-awakening and accepting another charge. I also use the UK Charger through a voltage-converter into the US wall-socket.

I expect there's a technical reason for this which is above me but I took the precaution of doing this in the open air with commonsense safety precautions just in case, but in my case nothing dangerous occurred but the 18v tools now work once again.

It was my son who told me about the freezing trick and I don't know if he heard a reason. I heard years ago when cordless was still fairly new that incomplete discharge before recharging could cause a gel layer to form that would prevent the transfer of ions. The newer chargers are supposed to help prevent that from happening. Maybe both the freezing and higher voltage do something similar.

 

[DesertRatTom]

I had a Makita 14.4 v battery rebuilt a few years ago. They substituted slightly smaller batteries. It was very unsatisfactory, didn't run long, recharge really seemed to take a long time. I won't rebuild again unless DeWalt gets stupid and discontinues the 18v batteries. Given how good they are, maybe they'll outlast me.

 

[Daniel80]

Hi,


I also had same issues with my makita batteries not being chargeable any more even they were not very old or used too much.

In my case I had 14,4 V Li ION batteries. As result I have found a solution which targets LITHIUM ION Batteries (even it may not help with NiCd Batteries) here is what I have done:

maybe it helps someone..

Greets

Daniel

 

[Knothead47]

I have five Ryobi batteries and tried freezing one- didn't work. There is a way to use an electric welder to rejuvenate a battery but I don't have a welder and too chicken to try it.
JOAT, I understand where you are coming from. My Crapsman corded drill won't drive screws but my Ryobi cordless will handle just about any screw.